/dev/snd/* permissions/ownership incorrect

[Dennis J.]

On 10/11/2008 10:55 PM, Adam Pribyl wrote:
> On Sat, 11 Oct 2008, Rahul Sundaram wrote:
>
>> Dennis J. wrote:
>>> Since I updated to the latest packages in koji a few days ago the
>>> device nodes in /dev/snd/* no longer seem to have the right
>>> ownership/permissions which causes audio playback through alsa to
>>> fail. Doing a "chmod o+rw /dev/snd/*" makes audio work again.
>>>
>>> What package is responsible for setting this up correctly so I can
>>> file bug against it?
>>
>> My guess would be ConsoleKit
>
> Yes and no. In past this happend to several sound cards too, root cause
> was that kernel /sys structure had changed, the HAL was not able to find
> the hardware, and the sound devices were not set correctly. CosoleKit
> takes the info from HAL, which is not aware of the card and does not set
> the permissions. Quick try: lshal | grep alsa

HAL seems to detect the card correctly:

udi = '/org/freedesktop/Hal/devices/pci_1412_1712_sound_card_0_alsa_playback_0'
   alsa.card = 0  (0x0)  (int)
   alsa.card_id = 'M Audio Audiophile 24/96'  (string)
   alsa.device = 0  (0x0)  (int)
   alsa.device_file = '/dev/snd/pcmC0D0p'  (string)
   alsa.device_id = 'ICE1712 multi'  (string)
   alsa.originating_device = 
'/org/freedesktop/Hal/devices/pci_1412_1712_sound_card_0'  (string)
   alsa.pcm_class = 'generic'  (string)
   alsa.type = 'playback'  (string)
   info.capabilities = {'alsa', 'access_control'} (string list)
   info.category = 'alsa'  (string)
   info.udi = 
'/org/freedesktop/Hal/devices/pci_1412_1712_sound_card_0_alsa_playback_0' 
(string)
udi = '/org/freedesktop/Hal/devices/pci_1412_1712_sound_card_0_alsa_capture_0'
   alsa.card = 0  (0x0)  (int)
   alsa.card_id = 'M Audio Audiophile 24/96'  (string)
   alsa.device = 0  (0x0)  (int)
   alsa.device_file = '/dev/snd/pcmC0D0c'  (string)
   alsa.device_id = 'ICE1712 multi'  (string)
   alsa.originating_device = 
'/org/freedesktop/Hal/devices/pci_1412_1712_sound_card_0'  (string)
   alsa.pcm_class = 'generic'  (string)
   alsa.type = 'capture'  (string)
   info.capabilities = {'alsa', 'access_control'} (string list)
   info.category = 'alsa'  (string)
   info.udi = 
'/org/freedesktop/Hal/devices/pci_1412_1712_sound_card_0_alsa_capture_0' 
(string)
udi = '/org/freedesktop/Hal/devices/pci_1412_1712_sound_card_0_alsa_midi_0'
   alsa.card = 0  (0x0)  (int)
   alsa.card_id = 'M Audio Audiophile 24/96'  (string)
   alsa.device = 0  (0x0)  (int)
   alsa.device_file = '/dev/snd/midiC0D0'  (string)
   alsa.originating_device = 
'/org/freedesktop/Hal/devices/pci_1412_1712_sound_card_0'  (string)
   alsa.type = 'midi'  (string)
   info.capabilities = {'alsa', 'access_control'} (string list)
   info.category = 'alsa'  (string)
   info.udi = 
'/org/freedesktop/Hal/devices/pci_1412_1712_sound_card_0_alsa_midi_0'  (string)
udi = '/org/freedesktop/Hal/devices/pci_1412_1712_sound_card_0_alsa_control__1'
   alsa.card = 0  (0x0)  (int)
   alsa.card_id = 'M Audio Audiophile 24/96'  (string)
   alsa.device_file = '/dev/snd/controlC0'  (string)
   alsa.originating_device = 
'/org/freedesktop/Hal/devices/pci_1412_1712_sound_card_0'  (string)
   alsa.type = 'control'  (string)
   info.capabilities = {'alsa', 'access_control'} (string list)
   info.category = 'alsa'  (string)
   info.udi = 
'/org/freedesktop/Hal/devices/pci_1412_1712_sound_card_0_alsa_control__1' 
(string)

BTW I found this bug: https://bugzilla.redhat.com/show_bug.cgi?id=332781
and when I apply the changes in comment #17 things are set up correctly 
once I log into my X session. That bug is quite old though and I'm not sure 
if this way of fixing this has been supplanted by ConsoleKit in the mean time.

Regards,
   Dennis